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dc.contributor.authorGreen, Jeremy
dc.contributor.authorHasan, Nesreen
dc.contributor.authorMeinel, Stefan
dc.contributor.authorEngelhardt, Michael
dc.contributor.authorKrieg, Stefan
dc.contributor.authorLaeuchli, Jesse
dc.contributor.authorNegele, John
dc.contributor.authorOrginos, Kostas
dc.contributor.authorPochinsky, Andrew
dc.contributor.authorSyritsyn, Sergey
dc.date.accessioned2017-07-12T16:29:18Z
dc.date.available2017-07-12T16:29:18Z
dc.date.issued2017-06-14
dc.identifier.citationUp, down, and strange nucleon axial form factors from lattice QCD 2017, 95 (11) Physical Review Den
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.doi10.1103/PhysRevD.95.114502
dc.identifier.urihttp://hdl.handle.net/10150/624681
dc.description.abstractWe report a calculation of the nucleon axial form factors G(A)(q)(Q(2)) and G(A)(q)(Q(2)) for all three light quark flavors q is an element of{u, d, s} in the range 0 <= Q(2) less than or similar to 1.2 GeV2 using lattice QCD. This work was done using a single ensemble with pion mass 317 MeVand made use of the hierarchical probing technique to efficiently evaluate the required disconnected loops. We perform nonperturbative renormalization of the axial current, including a nonperturbative treatment of the mixing between light and strange currents due to the singlet-nonsinglet difference caused by the axial anomaly. The form factor shapes are fit using the model-independent z expansion. From G(A)(q)(Q(2)), we determine the quark contributions to the nucleon spin and axial radii. By extrapolating the isovector G(P)(u-d)(Q(2)), we obtain the induced pseudoscalar coupling relevant for ordinary muon capture and the pion-nucleon coupling constant. We find that the disconnected contributions to G(P) form factors are large, and give an interpretation based on the dominant influence of the pseudoscalar poles in these form factors.
dc.description.sponsorshipOffice of Science of the U.S. Department of Energy; National Science Foundation [ACI-1053575, CCF-121834, PHY-1520996]; Forschungszentrum Julich; U.S. Department of Energy Office of Nuclear Physics [DE-FG02-94ER40818, DE-SC-0011090, DE-FG02-96ER40965, DE-FC02-12ER41890, DE-FG02-04ER41302, DE-AC02-05HC11231, DE-AC05-06OR23177]; RIKEN Foreign Postdoctoral Researcher program; RIKENBNL Research Center; Deutsche Forschungsgemeinschaft [SFB-TRR 55]; PRISMA Cluster of Excellence at the University of Mainzen
dc.language.isoenen
dc.publisherAMER PHYSICAL SOCen
dc.relation.urlhttp://link.aps.org/doi/10.1103/PhysRevD.95.114502en
dc.rights© 2017 American Physical Society.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleUp, down, and strange nucleon axial form factors from lattice QCDen
dc.typeArticleen
dc.contributor.departmentUniv Arizona, Dept Physen
dc.identifier.journalPhysical Review Den
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en
dc.eprint.versionFinal published versionen
refterms.dateFOA2018-09-11T21:11:34Z
html.description.abstractWe report a calculation of the nucleon axial form factors G(A)(q)(Q(2)) and G(A)(q)(Q(2)) for all three light quark flavors q is an element of{u, d, s} in the range 0 <= Q(2) less than or similar to 1.2 GeV2 using lattice QCD. This work was done using a single ensemble with pion mass 317 MeVand made use of the hierarchical probing technique to efficiently evaluate the required disconnected loops. We perform nonperturbative renormalization of the axial current, including a nonperturbative treatment of the mixing between light and strange currents due to the singlet-nonsinglet difference caused by the axial anomaly. The form factor shapes are fit using the model-independent z expansion. From G(A)(q)(Q(2)), we determine the quark contributions to the nucleon spin and axial radii. By extrapolating the isovector G(P)(u-d)(Q(2)), we obtain the induced pseudoscalar coupling relevant for ordinary muon capture and the pion-nucleon coupling constant. We find that the disconnected contributions to G(P) form factors are large, and give an interpretation based on the dominant influence of the pseudoscalar poles in these form factors.


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